“Ali, who suffers from Parkinson’s disease, is being treated by his team of doctors and is in fair condition,” spokesman Bob Gunnell said in a statement. “A brief hospital stay is expected. At this time, the Muhammad Ali family respectfully requests privacy.”

Ali, 74, also was hospitalized in January 2015 with a urinary tract infection.

According to TMZ Sports, Ali’s last public appearance came in April when the former world heavyweight champion attended a charity event in Arizona.